Memory XRM profile not working B450 Gaming ITX

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   I have a pair of crucial 3600 CL16 RAM (2x8GB). But I am struggling to get it to run at its advertised speed of 3600MHz, it's stuck at 2666.

Also had a 3200 rated stick, and those would run at around 2133, and the XRM for those also don't work.

Have manually entered the voltages and timings, updated to the latest BIOS, but still won't work. Am I doing something wrong or should I bin this motherboard as it's not built for these memory speeds/Ryzen 3000 series and buy a new one?

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leepox Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 15 Apr 2020 Status: Offline Points: 5	Post Options Post Reply Quote leepox Report Post Thanks(0) Quote Reply Topic: Memory XRM profile not working B450 Gaming ITX Posted: 15 Apr 2020 at 3:57am
	I have a pair of crucial 3600 CL16 RAM (2x8GB). But I am struggling to get it to run at its advertised speed of 3600MHz, it's stuck at 2666. Also had a 3200 rated stick, and those would run at around 2133, and the XRM for those also don't work. Have manually entered the voltages and timings, updated to the latest BIOS, but still won't work. Am I doing something wrong or should I bin this motherboard as it's not built for these memory speeds/Ryzen 3000 series and buy a new one?

ThreeDee Members Profile Send Private Message Find Members Posts Add to Buddy List Senior Member Joined: 24 Jul 2019 Location: Billings,MT Status: Offline Points: 2396	Post Options Post Reply Quote ThreeDee Report Post Thanks(0) Quote Reply Posted: 15 Apr 2020 at 8:27am
	what cpu? .. 1st GEN Ryzen's didn't have a very robust memory controller .. 2nd Gen was better .. and 3rd Gen is even better .. Memory on QVL for your CPU?
	\|Ryzen 5 5900\|ASRock X570 Taichi-BIOS 4.60\|2x16GB HyperX Predator RGB 3200@3600 1:1 IF\|ASRock RX 6700XT\|2 x PCIe 4.0 M.2 Drives for OS & Games\|850 WTT Seasonic 80+ Titanium PSU\|Noctua NH-D15\|

leepox Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 15 Apr 2020 Status: Offline Points: 5	Post Options Post Reply Quote leepox Report Post Thanks(0) Quote Reply Posted: 15 Apr 2020 at 11:33pm
	I've got a 3700x and people who have this memory are able to run it without a sweat at 3600Mhz on their rigs (Ballistix CL16 Micron E Die). Just wondering if this is a physical barrier with this motherboard.

ThreeDee Members Profile Send Private Message Find Members Posts Add to Buddy List Senior Member Joined: 24 Jul 2019 Location: Billings,MT Status: Offline Points: 2396	Post Options Post Reply Quote ThreeDee Report Post Thanks(0) Quote Reply Posted: 16 Apr 2020 at 1:49am
	generally it has more to do with the onboard memory controller in the CPU. It could be part motherboard , part possible dud cpu. You say you are running the 3.70 BIOS?
	\|Ryzen 5 5900\|ASRock X570 Taichi-BIOS 4.60\|2x16GB HyperX Predator RGB 3200@3600 1:1 IF\|ASRock RX 6700XT\|2 x PCIe 4.0 M.2 Drives for OS & Games\|850 WTT Seasonic 80+ Titanium PSU\|Noctua NH-D15\|

leepox Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 15 Apr 2020 Status: Offline Points: 5	Post Options Post Reply Quote leepox Report Post Thanks(0) Quote Reply Posted: 16 Apr 2020 at 9:34pm
	Yes I'm running the 3.7 BIOS, I've managed to get it to run at 3466Mhz@16-16-16-36 (Soc@1.025, VRAM 1.35V) after a lot of tweaking. I'm now using the 3600 calculated timings using the DRAM calculator, and just dialled down the speed. I can't seem to get past this speed so I guess I'll have to settle with the tighter timings. Was hoping to get a 1:1 IF ratio, but this will do for now. The only other B450 itx that specifies 3600 compatibility is the ASUS B450i STRIX motherboard, but that costs 1.5x more.